"Childlike glee" refers to the pure, innocent, and uncontained happiness that is often seen in children. It's a joyful state of excitement, wonder, and delight that is free from stress or worries. Full definition
Holed up and becoming increasing desperate, these educators soon act out deadly revenge fantasies with an eerie sense of childlike glee before realising they're going to actually have carry them out in order to survive. (thehollywoodnews.com)
From Laura Dern's childlike glee at holding a blaster to Adam Driver's hunkiness, it's all covered! (decider.com)
It does a great job of instilling childlike glee and a sense of adventure, and you want to explore it just for the sake of exploring. (rpgland.com)